Mobile Ad Hoc Networks汇.ppt

Mobicom98 (c) 1998 Vaidya, Texas AM University Mobile Ad Hoc Networks Nitin H. Vaidya Texas AM University vaidya@ /faculty/vaidya/ ? 2000 Nitin Vaidya Notes For a larger set of tutorial slides, please go to /faculty/vaidya and follow the link to Seminars Notes Names in brackets, as in [Xyz00], refer to a document in the list of references The handout may not be as readable as the original slides, since the slides contain colored text and figures Note that different colors in the colored slides may look identically black in the black-and-white handout Tutorial Outline Introduction Unicast routing Medium Access Control Performance of UDP and TCP Security Issues Implementation Issues Standards activities Open problems Notes Only most important features of various schemes are typically discussed Most schemes include many more details, and optimizations Not possible to cover all details in this tutorial Be aware that some protocol specs have changed several times Jargon used to discuss a scheme may occasionally differ from that used by the proposers Mobile Ad Hoc Networks (MANET)Introduction and Generalities Mobile Ad Hoc Networks Formed by wireless hosts which may be mobile Without (necessarily) using a pre-existing infrastructure Routes between nodes may potentially contain multiple hops Mobile Ad Hoc Networks May need to traverse multiple links to reach a destination Mobile Ad Hoc Networks (MANET) Mobility causes route changes Why Ad Hoc Networks ? Ease of deployment Speed of deployment Decreased dependence on infrastructure Many Applications Personal area networking cell phone, laptop, ear phone, wrist watch Military environments soldiers, tanks, planes Civilian environments taxi cab network meeting rooms sports stadiums boats, small aircraft Emergency operations search-and-rescue policing and fire fighting Many Variations Fully Symmetric Environment all nodes have identical capabilities and responsibilities Asymmetric Capabilities trans